| <!doctype html> |
| <html> |
| <head> |
| <title>invisible operators</title> |
| <meta charset="utf-8"/> |
| </head> |
| <body> |
| |
| <math> |
| <mrow> |
| <mi>f</mi> |
| <mo lspace="0em" rspace="0em"></mo> |
| <mrow> |
| <mo>(</mo> |
| <mi>x</mi> |
| <mo>)</mo> |
| </mrow> |
| </mrow> |
| </math> |
| <math> |
| <mrow> |
| <mi>sin</mi> |
| <mo lspace="0em" rspace="0em"></mo> |
| <mi>x</mi> |
| </mrow> |
| </math> |
| <math> |
| <mrow> |
| <mi>x</mi> |
| <mo lspace="0em" rspace="0em"></mo> |
| <mi>y</mi> |
| </mrow> |
| </math> |
| <math> |
| <msub> |
| <mi>m</mi> |
| <mrow> |
| <mn>1</mn> |
| <mo lspace="0em" rspace="0em"></mo> |
| <mn>2</mn> |
| </mrow> |
| </msub> |
| </math> |
| <math> |
| <mrow> |
| <mn>2</mn> |
| <mo lspace="0em" rspace="0em"></mo> |
| <mfrac> |
| <mn>3</mn> |
| <mn>4</mn> |
| </mfrac> |
| </mrow> |
| </math> |
| |
| </body> |
| </html> |
